That shows a lack of confidence in their own work and knowledge!!

If that was the SF Benz dealer, I had seen older diesel there about 4-5 months ago (when I went for some small parts).
They may have changed policy.
Well at least an indie mechanic can no longer say, "the dealer would have charged more!".

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD